I did the Y pipe, cat and muffler replacement on my 99' V10, love it but there is some drone in the cab. It's a 3" Dynomax turbo muffler that sounds good, but it's kinda loud and has a lot of drone around town but hardly any at 50-65 and a little at 70mph.

Any ways to reduce this???

Thanks,
Cole

 

Did you remove the Cat?

 

No aftermarket high flow was installed at suggestion of the muffler shop.

 

Gotha , If you don't want to swap out the muffler ( I went with a flowmaster 70 ) Generally the larger the muffler the less drone you will have. I know some guys put another little baffle type muffler to get rid of the drone..

 

Yea I wouldn't know which muffler to put inbetween, there is a perfect spot for a resonator or small muffler in front of the dynomax

 

Resonator is the word I was looking for, Put one of those in there should help with the Drone..

 

As mentioned look for a resonator in a 3" variety. Look for a "glasspack" style. This will help scavenge some more of the tones out.
Also if that doesn't help, don't forget about our 90 day Guarantee/Warranty.

Warranty / Guarantee

90-Day Risk-Free Trial Offer
Try qualifying DynoMax® products* for 90 days. We guarantee you'll experience the DynoMax® performance difference! If, for any reason, the qualifying products* don't live up to your expectations within the first 90 days, replace the products and we will refund your original product's purchase price (which shall not exceed the manufacturer’s suggested retail price), plus labor (up to $50 per exhaust system). We're that confident you will be satisfied with DynoMax® performance products! For questions about this offer, please contact our customer service department at 734-384-7898.

*Offer limited to the purchase of DynoMax® Stainless Steel Cat-Back Systems and Ultra Flo™ SS Polished, Ultra Flo™ Welded, DynoMax® VT™ or Super Turbo™ performance muffler. This offer does not include products which have been modified, improperly applied or installed on vehicles used for commercial or racing purposes. Valid only on vehicles used for private, non-commercial use and may be withdrawn at any time.

 

I will probably try a resonator as my local shop lets me hear the sound before they weld anything in.

Don't glass packs wear out???

I know my local shop has 3" by 18" long glass packs to try.

 

ISH on the wearing out part. Since there isn't much fiber in them they tend to pack a bit quicker. You could look to a larger round muffler with more fiber too, but those tend to cost more.